package network;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Li_DaChiZi
 * Date: 2025/7/21
 * Time: 10:30
 */
public class TcpEchoClient {
    private Socket socket = null;

    public TcpEchoClient(String ServerIP, int serverPort) throws IOException {
        socket = new Socket(ServerIP,serverPort);
    }

    public void start() {
        System.out.println("客户端启动！");

        try (InputStream inputStream = socket.getInputStream();
             OutputStream outputStream = socket.getOutputStream()) {
            Scanner scanner = new Scanner(inputStream);
            Scanner scannerIn = new Scanner(System.in);
            PrintWriter printWriter = new PrintWriter(outputStream);
            while (true) {
                // 1.从控制台读取数据
                System.out.print("->");
                String request = scannerIn.next();
                // 2.把请求发送给服务器
                // printWriter 会先将io存储在缓冲区，通过flush来迅速推送。
                printWriter.println(request);
                printWriter.flush();
                // 3.从服务器获取响应
                if (!scanner.hasNext()) {
                    break;
                }
                String response = scanner.next();
                // 4.打印响应结果
                System.out.println(response);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static void main(String[] args) throws IOException {
        TcpEchoClient tcpEchoClient = new TcpEchoClient("127.0.0.1",9090);
        tcpEchoClient.start();
    }
}
